India’s Bengaluru is fast running out of water
Bhavani Mani Muthuvel and her family of nine have around five 20-litre buckets worth of water for the week for cooking, cleaning and household chores. “From taking showers to using toilets and washing clothes, we are taking turns to do everything,” she said. It's the only water they can afford.
A resident of Ambedkar Nagar, a low-income settlement in the shadows of the lavish headquarters of multiple global software companies in Bengaluru's Whitefield neighbourhood, Muthuvel is normally reliant on piped water, sourced from groundwater. But it's drying up. She said it's the worst water crisis she has experienced in her 40 years in the neighbourhood.
Bengaluru in southern India is witnessing an unusually hot February and March, and in the last few years, it has received little rainfall in part due to human-caused climate change. Water levels are running desperately low, particularly in poorer areas, resulting in skyhigh costs for water and a quickly dwindling supply.
City and state government authorities are trying to get the situation under control with emergency measures such as nationalizing water tankers and putting a cap on water costs. But water experts and many residents fear the worst is still to come in April and May when the summer sun is at its strongest.
The crisis was a long time coming, said Shashank Palur, a Bengaluru-based hydrologist with the think tank Water, Environment, Land and Livelihood Labs.
“Bengaluru is one of the fastest growing cities in the world and the infrastructure for fresh water supply is not able to keep up with a growing population," he said.
Groundwater, relied on by over a third of the city's 13 million residents, is fast running out. City authorities say 6,900 of the 13,900 borewells drilled in the city have run dry despite some being drilled to depths of 1,500 feet. Those reliant on groundwater, like Muthuvel, now have to depend on water tankers that pump from nearby villages.
Palur said El Nino, a natural phenomenon that affects weather patterns worldwide, along with the city receiving less rainfall in recent years mean “recharge of groundwater levels did not happen as expected.” A new piped water supply from the Cauvery River about 100km from the city has also not been completed, adding to the crisis, he said.
Another concern is that paved surfaces cover nearly 90 per cent of the city, preventing rainwater from seeping down and being stored in the ground, said T.V. Ramachandra, research scientist at the Centre for Ecological Sciences at Bengalurubased Indian Institute of Science. The city lost nearly 70 per cent of its green cover in the last 50 years, he said. Ramachandra compared the city's water shortage to the “day zero” water crisis in Cape Town, South Africa, 2018, when that city came dangerously close to turning off most taps because of a drought.
The Indian government estimated in 2018 that over 40 per cent of Bengaluru residents won't have access to drinking water by the end of the decade. Only those that receive piped water from rivers outside Bengaluru are still getting regular supply.
“Right now, everyone is drilling borewells in buffer zones of lakes. That is not the solution,” Ramachandra said.
He said the city should instead focus on replenishing the over 200 lakes spread across the city, stop new construction on lake areas, encourage rainwater harvesting and increase green cover across the city. “Only if we do this will we solve the city's water problem,” he said.